20016967
9
GB
4.
WORKING
4.1
COMBUSTION ADJUSTMENT
In conformity with Efficiency Directive 92/42/EEC
the application of the burner on the boiler,
adjustment and testing must be carried out
observing the instruction manual of the
boiler, including verification of the CO and
CO
2
concentration in the flue gases, their
temperatures and the average temperature
of the water in the boiler.
To suit the required appliance output, choose
the proper setting of the combustion head, and
the air damper opening.
4.2
COMBUSTION HEAD SETTING,
(see fig. 9)
The combustion head leaves the factory
set for the minimum output.
Setting depends on the output of the burner.
Rotate the setting screw (6) in a clockwise or
anticlockwise direction until set point marked
on the regulating rod (2) is level with the out-
side plane of the head assembly (1).
Figure 9 shows the head regulating rod set
on set point
3
.
Example for TIGRA 2 CG1210 1A burner:
The burner is installed in a 100 kW boiler.
Taking an efficiency level of 90% the burner
should give an output of app. 110 kW with
the regulating rod set at set point
3
as shown
in the diagram.
The diagram is for indication purposes: to
assure good working from the burner we
suggest adjusting the combustion head
according to the boiler.
REMOVING THE HEAD ASSEMBLY
Proceed as follows to remove the head
assembly:
³
Disconnect the connections (3 and 5).
³
Extract the small tube (4) and loosen the
screws (10).
³
Unscrew and remove the screws (7), pull
out the head assembly support (1) turning
it slightly to the right.
Take care not to change the setting posi-
tion on the elbow-bracket (2) during dis-
mantling.
REASSEMBLING THE HEAD ASSEMBLY
Follow the above instructions in reverse,
returning the head assembly (1) to its origi-
nal position.
S7004
Fig. 9
Set point
D8934
170.000
50.000
210.000
130.000
90.000
10.000
kcal/h
kW
0
8
2
4
6
210
10
50
70
110
130
150
170
190
30
90
230
250
10
270
12
911T1
912T1
91
3T
1
91
4T
1
